Additives are substances added to products in small quantities to enhance their properties, performance, or appearance. They play a crucial role in various industries, including food, pharmaceuticals, cosmetics, plastics, and construction. In the food industry, additives such as preservatives, colorants, flavor enhancers, and emulsifiers are used to improve the shelf life, taste, texture, and appearance of food products. For example, ascorbic acid (vitamin C) is used as an antioxidant to prevent spoilage, while lecithin is used as an emulsifier to stabilize mixtures of oil and water. In the pharmaceutical industry, additives such as binders, disintegrants, and lubricants are used in the formulation of tablets and capsules to ensure proper consistency, stability, and bioavailability of the active ingredients. In the cosmetics industry, additives such as humectants, thickeners, and preservatives are used to improve the texture, stability, and safety of skincare and makeup products. In the plastics industry, additives such as plasticizers, stabilizers, and colorants are used to enhance the flexibility, durability, and appearance of plastic products. In the construction industry, additives such as plasticizers, accelerators, and retarders are used in concrete and mortar to improve workability, strength, and setting time. The use of additives is essential for optimizing the performance and quality of products across various industries.